Abstract: The present disclosure pertains to the technical field of a catalyst. The present disclosure relates to a complexing agent for preparing titanium complexes for alpha olefin polymerization. In particular, the present disclosure provides titanium complexes for alpha olefin polymerization and methods of preparation thereof.

Abstract: The present disclosure relates to a process for preparing a transition metal-Schiff base imine ligand complex. The process involves direct chelation of a Schiff base imine ligand by adding a transition metal halide in a halogenated fluid medium at a temperature in the range of 20° C. to 40° C. The process employs less hazardous reagents and mild reaction conditions to obtain the complex. The complex is efficient to be used as a catalyst for the production of disentangled ultra-high molecular weight polyethylene.

Abstract: The present disclosure provides a Ziegler-Natta catalyst composition for preparing polymers of ethylene monomers having ultrahigh molecular weight, said composition comprises (i) a pro-catalyst component containing a reaction product of a magnesium containing compound and a titanium containing compound, characterized in that said pro-catalyst component comprises magnesium, titanium and chlorine in an amount ranging between 15 and 18 mole %; 20 and 23 mole %; and 60 and 64 mole %, respectively, all proportions being with respect to the total weight of the Ziegler-Natta catalyst composition; (ii) a co-catalyst component; and (iii) at least one external electron donor compound selected from the group of organosilane compounds having the general formula (I), wherein R1, R2, R3 and R4 are all the same or all are different, or some are the same, and are individually selected from the group consisting of linear or branched alkyl groups, cycloalkyl groups, aryl groups, alkoxy and aryloxy groups.

Abstract: The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from ?15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.

Abstract: A catalyst composition and a process for obtaining a colored olefin polymer are disclosed. The composition comprises a Ziegler-Natta catalyst and an additive component comprising a colorant. The catalyst composition enables a directly colored polymer to be prepared. The colored polymer has a homogeneous dispersion of the colorant in it and thus has no color defects.

Abstract: The present disclosure provides a heterogeneous Ziegler-Natta catalyst system to be used in the preparation of ultra-high molecular weight polymers (UHMWP). The system includes at least one procatalyst, at least one co-catalyst, at least one hydrocarbon medium and at least one external donor, wherein the ratio of elemental magnesium to elemental titanium to halide, in the procatalyst, is 1:1.3:3.7; the ratio of elemental aluminum, present in the co-catalyst to elemental titanium, present in the procatalyst, ranges between 6:1 and 12:1; and the ratio of elemental silicon, present in the external donor to elemental titanium, present in the procatalyst, ranges between 1:10 and 10:1. The present disclosure also provides a process for preparation of UHMWPE using the heterogeneous Ziegler-Natta catalyst system of the present disclosure.

Abstract: The present disclosure relates to a transition metal based pro-catalyst represented by Formula I: wherein, the substituents have the meaning as defined in the specification. The present disclosure also relates to a process for preparing the transition metal based pro-catalyst represented by Formula I and the catalyst composition obtained therefrom. Further, the present disclosure relates to a process for polymerizing olefins by employing the catalyst composition comprising the transition metal based pro-catalyst represented by Formula I.

Abstract: The present disclosure provides a Ziegler-Natta catalyst composition for preparing polymers of ethylene monomers having ultrahigh molecular weight, said composition comprises (i) a pro-catalyst component containing a reaction product of a magnesium containing compound and a titanium containing compound, characterized in that said pro-catalyst component comprises magnesium, titanium and chlorine in an amount ranging between 15 and 18 mole %; 20 and 23 mole %; and 60 and 64 mole %, respectively, all proportions being with respect to the total weight of the Ziegler-Natta catalyst composition; (ii) a co-catalyst component; and (iii) at least one external electron donor compound selected from the group of organosilane compounds having the general formula (I), wherein R1, R2, R3 and R4 are all the same or all are different, or some are the same, and are individually selected from the group consisting of linear or branched alkyl groups, cycloalkyl groups, aryl groups, alkoxy and aryloxy groups.

Abstract: A catalyst composition and a process for obtaining a colored olefin polymer are disclosed. The composition comprises a Ziegler-Natta catalyst and an additive component comprising a colorant. The catalyst composition enables a directly colored polymer to be prepared. The colored polymer has a homogeneous dispersion of the colorant in it and thus has no color defects.

Abstract: The present disclosure relates to a transition metal based pro-catalyst represented by Formula I: wherein, the substituents have the meaning as defined in the specification. The present disclosure also relates to a process for preparing the transition metal based pro-catalyst represented by Formula I and the catalyst composition obtained therefrom. Further, the present disclosure relates to a process for polymerizing olefins by employing the catalyst composition comprising the transition metal based pro-catalyst represented by Formula I.

Abstract: The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from ?15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.

Abstract: The present disclosure provides a heterogeneous Ziegler-Natta catalyst system to be used in the preparation of ultra-high molecular weight polymers (UHMWP). The system includes at least one procatalyst, at least one co-catalyst, at least one hydrocarbon medium and at least one external donor, wherein the ratio of elemental magnesium to elemental titanium to halide, in the procatalyst, is 1:1.3:3.7; the ratio of elemental aluminum, present in the co-catalyst to elemental titanium, present in the procatalyst, ranges between 6:1 and 12:1; and the ratio of elemental silicon, present in the external donor to elemental titanium, present in the procatalyst, ranges between 1:10 and 10:1. The present disclosure also provides a process for preparation of UHMWPE using the heterogeneous Ziegler-Natta catalyst system of the present disclosure.